System



F. ZOGBAUM `SIGNALING SYSTEM Filed Nov. 18. 1921 kubus, kwol Aug. 9, 1927.

Patented Aug. l9, 1927.

NUNIT-ED STATES PATENT OFFICE.

FERDINAND ZOCarBATJ'llll,` OF NEW YORK,` N. Y., .ASSIGNOR TO WESTERN ELECTRIC COM- i PANY, INCORPORATED, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

SIGNALING SYSTEM.'

Application filed November 18, 1921.

This invention relates to signaling systems, and more particularly to systems for indicating the operation of remotely controlled power switches.

It is `an object of the invention to provide an alarm system including an audible and a visible signal. i

One feature of the invention Acomprises a supervisory system for remotely controlled devices wherein each device is connected to a relay through a single metallic conductor whereby a signal indicative of the operation of the device may be relayed to the indicating apparatus remote therefrom.

Another 'feature is the provision ont a system for the supervision of remote switches comprising a bell alarm to indicate the operation or change in position of any switch in the circuit in addition to the use of individual indicating lamps which designate the position ofthe particular switch operated. A polarized receiving relay is provided. for each power switch in the circuit, each of Y these relays having a contact which opens for a short period while the relayl armature i is passing from oneside to the other due to the operation of a `power switch at the substation. `The operation of' `any of these polarized relays momentarily deenergizes a 'neutral relay `whichis normally energized by battery over a circuit including contacts associated with the polarized relays. The momentary deenergization `of this` relay allows an impulse of current to tlow'from the battery to a second neutral relay of the slow releasing type `which remains energized `for a given period, closing its contact and ,operating the bell alarm:

Other objects and features of the invention willappear from a consideration of the following description taken in conjunction with the accompanyingdrawing and the appended claims. i

i The drawingr shows a schematic illustration of the invention in its preferred form, only so much of the substation circuit being shown as is necessary to a complete understanding of the invention.

Referring tothe drawing, a plurality ot.,

power switches 1, 2 and 3 are located at a sub-station, or at a plurality ot sub-stations, and are controlled either by manual operation or by any suitable remote-control system, not shown in the drawing. The power switch 1 `carries a contact 4 which is de- Seral No. 516,078.

signed to engage with one or the other oi contacts 5 and 6 connected to a source of current supply 45. The switch 2 carries a correspondingcontact 7, adapted for engagement with either oi contacts 8 or 9; while the switch 3 is provided with a contact l() and associated contacts 11 and 12. Whether the Contact 5 or 6 is engaged by switch contact 4 depends upon the position of the power switch 1. Similarly, the positions of the switches 2 and 3 determine the respective positions of their contacts. i The power switches are merely provided with additional contacts so that upon opening or closlng, a circuit will be completed through the respective contacts for effectingthe operation of indicating mechanism at the central control station, as will be hereinafter described. The contact 4 of power switch 1 is connected by means of line wire 13 to a polarized relay 14 with which is associated a pan' of electric lamps 15 and 16, at the central station. The contact 7 of switch 2 isconnected through line wire 17 to a p0larized relay 18, which has associated with it lamps 19 and 20; while the switch contact 1()` is connected through the line 21 to the relay 22 with which there are associated the lamps 23 and 24. One or the other of each 'of these pairs ot' lamps is normally lighted,

current being supplied thereto by a battery 25 through contacts associated with the polarized relays. The energizing current for the polarized relays is provided by the source of current 45 which may be located at the substation, as shown in the drawing. Thus, the attendant at the lcentral station, by observing the lamp that is lighted is informed of the position of any given switch. In practice, it is preferred to have the lamps 15, 19 and 23 green, and the lamps 16, 20 and 24, red. The lighting oit a red lamp informs the attendant that a certain power switch is closed, while the lighting of a green lamp will at once indicate that a particular switch has been moved to the open position. A bell 26 which is common to all the polarized relays is provided to sound an alarm upon the operation of any power switch in the series. The bell 26 is controlled by the operation ol a neutral relay 27 of the slow releasing type. The relay 27, in turn, is con trolled bythe operation of a second neutral relay 2S. The relay 28 is normally energized over a` circuit extending from the posit-ive at reaaaee side oit battery 25, conductors lll and lll, through a Contact such as 29 oiirclay let, a contact 30 of relay 18, a contact Si et relay 22, windingo t relay 28, to the negative side of battery 25.

The operation of the system is as follows: The main contacts of the power switch l, not shown, are considered to be open, the auxiliary contact 4: being in engagement with contact 6, completinga circuit from the negative side of battery 45, switch contacts 6 and 4L, line 13, through the windings of polarized relay M to ground. Negative potential thus applied to the polarized relay la causes it to close its associated contacts 29 and 32, the closing1 of contact 32 short circuitingthe lamp 16 and lighting` the lamp l5 over a circuit entending from the positive side of battery 25, lamp l5, conductor 42, contact 32 or the relay 14E, conductor d3, to the negative side of the battery. lVhen the switch l is closed, Contact 4i; is moved into engagement with contact 5 completing an energizing circuit iforr polarized relay let which may be traced from the positive side of battery L15, contacts 5 and 4 oit power switchl, line i3, through the windings of polarized relay let to ground. Upon operating, relay la closes Contact 33, short-circuiting lamp l5, and also closes Contact 34, providingl a circuit for the lamp 16 which may be traced 'from the negative side or battery 25, lamp 16, conductor 42, contact 33 to the positive side of battery 25. is the contact 32 opens while the relay armature is passing from one side to the other, the neutral relay 28 is momentarily deenergized, closing its contact for an instant. The relay 28 in deenergizing releases its armature and establishes a circuit from the positive side of battery 25, conductor l0, through the winding` oit relay 27, armature and contact 85 of relay 2S, to the negative side ol battery 25. rlhis allows an impulse oi current to energize the relay 27, causing it to close its contact and complete a circuit for the bell 26 which extends 'from the positive side of battery 25, conductor 40, contact 35 oi relay 27, through the bell 26 to negative side ot battery 25. Since the relay 27 is of the slow-releasing type, it holds ior a period oli' time suliicient to ring the bell 2G. However, as the arn'iature oit polarized relay 14 moves from one side to the other, after breaking' the contacts 29 and causing an operation or the bell 2G, as just described,

it closes the contact 234i-, completingl an energizing circuit for the neut al relay 28 wliich extends from the negative side o the battery 25, through the windingv of the relay 28, through contact 3l of polarized relay 22, through Contact 30 oi" polarized relay 18, through contact 34 of polarized relay lt to the positive side of battery 25. The circuit thus established energizes the relay 2S, cansing it to open contact 3, thus cuti:ing-oli;1 battery to the relay 27, upon the deenernization of which the operating; circuit oi the bell 2G is broken. iihc operation oll the i systen'i upon the change in position oi any relay and controlled by saidipewer switch,

a pair oit :indicatiupI devices, an energizing circuit for said indicating devices, ineens controlledby said polarized relay,` :tor selectively rendering one ci said indicatinp,` de

`vices inoperative, a relay at said central station, a circuit i'or nornially energrizinuv the saine, a slow releasingl ielay, a circuit therefor inclinlinp,l a back contact ol said normally energized relay, un :darin device,

means operated by said slow releasiue' relay flier actuating,I the saine, and means :ier inow nientarily decimi'gizingr said norn'iztlly ener gized relay upon the opera tien oit said switch controlled relay to operate said alarm device.

2. ln a system for indicating,l the operabtion ot electrical apptu'zitus, a. central. station, a remote station, a plurality et power switches at :aid remote station cach connected with said central station by a cenduetor individual to each switch; a igilnrality of polarized relays at said central station each controlled by the operation or its corresponding' power switch over said condnctor a pair of electric lamps associated with and controlled by each polarized relay to indicato the operation ot its respective switch, an energizing circuit `itor said lamps, means controlled by each oit said polarizeil relays for selectively rendering; one olf its associated lamps inoperative, a plurality oli? contact members oneaeh ot said polarized relays, a relay at said. central station, a circuit therefor including; contacts eti." said polarized relays, a slow1elcasi1iz; relay, a circuit therefor closed upon the doeneririzak tion oli said first mentioned relay, un alarm device, a circuit therefor closed by the operation of said slow-releasing relay, whereby the operation ott the contact members associated with any polarized relay moinentarily breaks the circuit ot said nornndly energized relay to momentarily energize said slow-releasing relay to operate said alarm device.

In witness whereof, l hereunto subscribe my name this 15th day oi November, it. D., 1921.

FERDINAND EUGldrlillltll.

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